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Enjoying life

I know there are lots of threads and lots of possibilities but I wanted to start one that hopefully will stay on track and highlight what to check and when, if this problem arises for anyone in the future.

Firstly, my Ep3 has been my daily since early September since selling my Fn2. It started with a similar mpg to the Fn2 of around 31mpg but has slowly got worse, I'm guessing it's around 24mpg at the moment. Oil usage is a bit more than normal, but I have changed the oil and transmission fluid since September.
90% of my driving is the commute which is 18 miles each way on an open A road with a mile or two of city driving (stop/start). Speeds average 45mph, a few bursts of vtec from junctions etc
No EML, no loss of power, no misfire or rough idle. Tyres are good and set right, no brakes binding although I am getting a whiff after driving which leads me onto possible problem number 1. One of the o2 sensors could be on it's way out. Number 2, it could be the cat on it's way out.
Other causes could be....
3. Bad spark plugs - I checked when I bought the car and they looked recent
4. Faulty injectors - I need to pulse test and also check with multimeter
5. Dirty Air Filter - the air filter on the teg was clean when I installed it, don't think it will be this
6. Throttle body - need to check it's clean/not stuck open
7. Valve clearance - I really need to get this done, could be a cause, especially when the oil consumption is up too

I'm going to do a compression test when I re-check through plugs, it can't hurt

Enjoying life

I used to 50/50 between fill ups with V Power and Momentum, but mostly momentum now. All pipes etc seem OK, can't imagine it's electrical as everything seems smooth. A manifold leak might explain the whiff.

Earth Dreams :)

Flashy.... on our CRV.
Changed the front tyres, still in legal limit and pressures are checked every other week.. we found in the same new brand/make, same psi (just newer) that mpg has improved by 4mpg.
Weird I know, just wanted to throw that in the mix as a FYI..

Enjoying life

I will do the valve clearance on Saturday and put on the new rocker cover kit which includes plug seals. When I checked the plugs they had a bit of an oil banding, not enough to concern me but nonetheless. If excess oil is getting in the plug tube it will eventually damage the coil boot, may cause a short/weakness. This could explain the oil consumption and poor mpg. No misfire though.

Premium Member

Could be valve stem seal or worn piston ring which is passing oil, you compression test should show this. if compress is lower than should be then you may be using more fuel to compensate?
If it helps, I'm getting 27 MPG out of my FN2 on my daily commute of 10 mile :-(

250bhp.... finally :)

PCV netted me a 1-2 mpg back.
One or more of my injectors must've been leaking as fitting the RDX saw it rise to an average 28-32mpg now.

Unsure if the Teg is going to affect it much untuned but could be leaning it out so ECU is just dumping more fuel in to compensate. Hard to say without datalogs. Same could be on the other end with the O2 sensors.

Premium Member

PCV netted me a 1-2 mpg back.
One or more of my injectors must've been leaking as fitting the RDX saw it rise to an average 28-32mpg now.

Unsure if the Teg is going to affect it much untuned but could be leaning it out so ECU is just dumping more fuel in to compensate. Hard to say without datalogs. Same could be on the other end with the O2 sensors.

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Good day,
My civic have weird noises coming from engine bay VID_20200507_102933.mp4
When alternator band is taken off there is no noise at all. Car is currently in workshop from two weeks and its driving me mad. List of thing they changed:
band
belt tensioner
top pulley bearing
alternator...

As title
Took my throttle body off cause of hunting / surging idle when coasting after cleaning TB, tried the idle relearn 4 times, fixed nothing.
Was gonna clean the iacv but cant see one attached to the throttle body like on the ep3's
Cant find info on google, so does the fn2 actually have...

Anyone done the valve clearances themselves on FN2??
After getting a new honda rocker gasket Ive took mine apart today knowing i could do them myself after watching all the videos on youtube.... So i thought..
,
theres no fn2 vids on youtube only ep3's and lads doing them
After fighting just...

Hi guys,
Just got two Bosch oil filters for the FN2 from fleabay, thought they are all the same:
https://www.ebay.co.uk/itm/BOSCH-Oil-Filter-like-HAMP-Shorty-Stubby-FN2-Civic-Type-R-FREE-Sump-Washer/223567797176?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
To my annoyance they...

Idle at a stop seems fine (800rpm, give or take 10), but when coasting to a stop or downhill in neutral (doesn't matter if in gear with clutch disengaged or in neutral) the idle rpms are all over the place. Car runs fine otherwise, no problems accelerating or anything when driving.
Not sure...